121302200123 has 32 divisors (see below), whose sum is σ = 141753507840. Its totient is φ = 102866924160.

The previous prime is 121302200113. The next prime is 121302200147. The reversal of 121302200123 is 321002203121.

It is not a de Polignac number, because 121302200123 - 2¹⁰ = 121302199099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121302200113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1619540 + ... + 1692782.

It is an arithmetic number, because the mean of its divisors is an integer number (4429797120).

Almost surely, 2^121302200123 is an apocalyptic number.

121302200123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121302200123 is a deficient number, since it is larger than the sum of its proper divisors (20451307717).

121302200123 is a wasteful number, since it uses less digits than its factorization.

121302200123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73499.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 121302200123 its reverse (321002203121), we get a palindrome (442304403244).

The spelling of 121302200123 in words is "one hundred twenty-one billion, three hundred two million, two hundred thousand, one hundred twenty-three".